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D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again

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Old 19th March 2021, 10:55 AM
strummagnet strummagnet is offline
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Default Downpipe clearance at gearbox mount

Hi All,

After replacing near and offside downpipes with aftermarket BM units to my 2.8 QS (AMX engine) I have noticed that the clearance between the downpipe and the gearbox mount (the epdm cover?) is approx 10mm on the nearside and 20-25 on the offside at its shortest point. Now stupidly on my part I didnt check the clearance on the originals before removal. Would 10mm clearance be considered acceptable considering heat dissipation and movement of the powertrain under load?

Also, is there any worth in wrapping the downpipes in order to reduce heat dissipation into the engine bay?
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Old 22nd March 2021, 03:18 PM
strummagnet strummagnet is offline
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Hi, can anybody advise on my question above?
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Old 22nd March 2021, 04:14 PM
MikkiJayne MikkiJayne is offline
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I can't yet since its impossible to tell from above, and Ricky's is in bits on the lift. I can measure when that goes back together though. Thats a V8 of course, but it should be indicative.
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Old 22nd March 2021, 05:10 PM
strummagnet strummagnet is offline
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Quote:
Originally Posted by MikkiJayne View Post
I can't yet since its impossible to tell from above, and Ricky's is in bits on the lift. I can measure when that goes back together though. Thats a V8 of course, but it should be indicative.
Thanks MJ... the nearside downpipe never seemed to go back as a 'proper fit', offside replacement felt better, or maybe I got used to the process. The exhausts are level though.
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Old 22nd March 2021, 05:24 PM
strummagnet strummagnet is offline
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Quote:
Originally Posted by MikkiJayne View Post
I can't yet since its impossible to tell from above, and Ricky's is in bits on the lift. I can measure when that goes back together though. Thats a V8 of course, but it should be indicative.
Update. Transpires the Part I received "new other" had been tinkered with and the profile shape was out. A new replacement through BM corrected the issue, have 20-25mm clearance as needed.
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Last edited by strummagnet; 5th May 2021 at 02:49 PM.
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